Hybrid commercial house car camping mode control method

Abstract

The present application relates to the technical field of new energy vehicles, and in particular to a hybrid commercial house car camping mode control method, the specific steps being as follows: a camping mode button is pressed, and it is determined whether the conditions for entering the mode are met; the camping mode is entered; the battery is autonomously discharged through the inverter DC / AC of the vehicle; the upper installation is powered for a long time through the inverter; it is determined whether the battery SOC value is less than or equal to E2; if yes, "low power, engine power compensation" is displayed, and the VCU sends an engine start instruction; the engine is started; and power is generated at a certain rated engine speed, thereby solving the safety hazard problems of the current engine, such as insufficient air pressure, the need to start a mechanical air pump, insufficient power, the need for power compensation, and the like, frequent starting causing customers to be unable to rest quietly, the gear being randomly switched under the mistaken touch of the parking condition causing the vehicle to move, the power battery power being unable to maintain the power and being easily consumed, causing the vehicle to be unable to start or the power output being limited, and the like.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and more specifically, to a method for controlling the camping mode of a hybrid commercial RV. Background Technology

[0002] With the popularization of hybrid new energy passenger vehicles, people are gradually accepting hybrid new energy vehicles, and the number of new energy vehicles purchased is increasing year by year. At the same time, with the vigorous promotion of the national new energy strategy, the commercial vehicle sector has also undergone tremendous changes. More and more plug-in hybrid new energy commercial vehicles are being launched and commercialized. As a sub-market of commercial vehicles, RVs are favored by customers due to their advantages such as high load-bearing capacity and large space, which puts forward higher requirements for commercial vehicle chassis systems.

[0003] Most current plug-in hybrid electric motorhomes are modified from logistics trucks, without fully considering the motorhome's operating environment and customer needs. This leads to problems such as occasional inability to draw power, engine malfunctions requiring mechanical air pumps due to insufficient air pressure, frequent starting due to insufficient battery power preventing customers from resting quietly, accidental gear shifting while parked causing vehicle movement, and insufficient battery power leading to starting failure or limited power output, among other safety hazards. Summary of the Invention

[0004] This invention provides a control method for a hybrid commercial RV camping mode. Based on the characteristics of plug-in hybrid electric vehicles, it eliminates the need for an additional battery, directly drawing power from the vehicle to power the superstructure. Simultaneously, it considers the vehicle's NVH performance and safety features such as preventing accidental activation. It monitors the SOC value of the power battery in real time to ensure the RV customer experiences the quietest possible power supply. Only when the detected SOC of the power battery falls below a certain set threshold does the engine start, driving the motor to generate electricity, ensuring power supply to the superstructure and replenishing the power battery.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a hybrid commercial RV camping mode control method, the specific steps of which are as follows:

[0006] Step S1: When the vehicle enters the campsite, the vehicle is powered on and kept in the "READY" state. The gear shifter is placed in "N" or "P", and the parking button is pulled up. The parking system starts to work and sends a parking signal to the VCU. In the RV camping mode, the initial battery charge retention threshold is set to E1, the minimum allowable SOC discharge value of the battery is set to E2, and the second battery charge retention threshold is set to E3.

[0007] Step S2: Manually set E1 and E3 in MP5, where E3 ≤ E1. If E3 exceeds E1, it will be displayed in gray. The system defaults to E3 = E1.

[0008] Step S3: Press the camping mode button and determine if the conditions for entering this mode are met. If they are met, proceed to step S4.

[0009] Step S4: Enter camping mode. The battery discharges autonomously through the vehicle's built-in inverter (DC / AC). The superstructure draws power from the inverter for an extended period of time. Determine if the battery SOC value is ≤ E2. If yes, proceed to step S5.

[0010] In step S5, the instrument panel displays "Low battery, engine charging in progress". At the same time, the VCU sends an engine start command. The engine starts, and the VCU integrates the power consumption of the superstructure and the power of the battery charging, while also taking into account the NVH performance of the whole vehicle. Finally, it generates electricity at a certain rated engine speed. The generated electricity is distributed to the superstructure to ensure uninterrupted power consumption, and to the power battery to quickly replenish the power battery.

[0011] Further specifying, step S3, determining whether the conditions for entering this mode are met includes the following steps:

[0012] Step S3.1: After pressing the camping mode button, the VCU detects the information in step S1. If it is not executed properly, the instrument will display the corresponding information, such as "Vehicle not READY", "Brake system not working", "Gear not returned to N or P". Step 1 needs to be manually performed. If it is executed properly, proceed to step 3.2.

[0013] Step S3.2: The VCU checks whether there is a serious fault level in each controller of the vehicle. If there is, the instrument panel will display "Vehicle XX controller fault, unable to enter camping mode". If not, proceed to step 3.3.

[0014] In step S3.3, the VCU detects the vehicle speed. If the vehicle speed V > V1, the instrument panel displays "Speed ​​Fault," and the vehicle cannot enter camping mode. V1 is calibrated to a minimum value, typically 1 km / h. V1 is used to prevent accidental activation of the camping mode button and parking signal malfunction during driving, which could lead to vehicle failure and loss of control. If V ≤ V1, the VCU locks the gear position "N or P" and no longer checks the gear shift signal to prevent accidental vehicle movement. Simultaneously, the VCU locks the AutoHold function, preventing it from being unlocked by other signals, and proceeds to step S3.4.

[0015] In step S3.4, the VCU detects the first SOC value E1 threshold set by the power battery. If SOC < E1, the VCU starts the engine and replenishes the battery with the maximum charging power allowed by the current vehicle until E1 is met, then proceeds to step S3.5. If SOC ≥ E1, then proceeds directly to step S3.5.

[0016] Step S3.5: The VCU detects the brake air pressure, where P1 represents the pneumatic brake pressure relief threshold. This threshold can be calibrated independently depending on the vehicle model. When P < P1, the VCU starts the engine to replenish the brake air pressure until P1 is met, then proceeds to step S4. When P ≥ P1, proceed directly to step S4.

[0017] Furthermore, in camping mode, the instrument panel displays the camping mode and starts a timer. After 60 seconds, the instrument panel goes black, and lights and the vehicle's electrical equipment that are not related to this mode enter a dormant state.

[0018] Further specified, in camping mode, E1≥E3>E2, E3-E2≥10%, and at the same time, it is determined whether the SOC of the power battery is ≤E2. If not, the current state is maintained. If so, the engine continues to charge the battery at a certain rated speed until E3 is reached, and then step S6 is executed.

[0019] In step S6, the instrument panel displays that the power replenishment is complete, and the screen goes black again after 10 seconds; at the same time, the VCU sends an engine shutdown command, and the engine shuts down.

[0020] Further specifying, in camping mode, P2 represents the lowest threshold of the vehicle's brake air pressure. The VCU detects the brake air pressure, and if P≤P2, the instrument panel will display "Air pressure too low, do not drive" when it ends its sleep mode.

[0021] Further restrictions apply: when the brake air pressure P≤P2, the rear wheels will lock up, the entire vehicle will be locked and unable to move. When the camping mode is deactivated, the entire vehicle will be re-inflated.

[0022] Further specified, in camping mode, E2 is ≤10% under normal conditions.

[0023] The beneficial effects of adopting the above technical solutions are:

[0024] Based on the characteristics of plug-in hybrid electric vehicles, there is no need to add an additional household battery. Power is directly drawn from the vehicle to supply the superstructure. At the same time, the vehicle's NVH performance and safety features such as preventing accidental touches are taken into account. The power battery SOC value is monitored in real time to ensure the quietest power supply scenario for RV customers. Only when the detected power battery SOC is lower than a certain set threshold will the engine start to drive the motor to generate electricity, ensuring power supply for the superstructure and replenishing the power battery. Attached Figure Description

[0025] Figure 1This is a flowchart of the control architecture of the present invention.

[0026] Figure 2 This is a flowchart of the overall control strategy of the present invention. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and to facilitate its implementation.

[0028] This invention is a control method for camping mode of hybrid commercial RVs. It does not require the addition of an extra battery, but directly draws power from the vehicle to power the superstructure. At the same time, it takes into account the NVH performance of the whole vehicle and safety performance such as preventing accidental touch. It monitors the SOC value of the power battery in real time to ensure the quietest power supply scenario for RV customers.

[0029] Specifically, such as Figure 1 and Figure 2 As shown, the specific steps include:

[0030] Step S1: When the vehicle enters the campsite, the vehicle is powered on and kept in the "READY" state. The gear shifter is placed in "N" or "P", and the parking brake is engaged. The parking system starts working and sends a parking signal to the VCU. In RV camping mode, the initial battery charge retention threshold is set to E1, the minimum allowable SOC discharge value of the battery is set to E2, and the second battery charge retention threshold is set to E3.

[0031] Step S2: Manually set E1 and E3 in MP5, where E3 ≤ E1. If E3 exceeds E1, it will be displayed in gray. The system defaults to E3 = E1.

[0032] Step S3.1: After pressing the camping mode button, the VCU detects the information in step S1. If it is not executed properly, the instrument will display the corresponding information, such as "Vehicle not READY", "Brake system not working", "Gear not returned to N or P". Step 1 needs to be manually performed. If it is executed properly, proceed to step 3.2.

[0033] Step S3.2: The VCU checks whether there is a serious fault level in each controller of the vehicle. If there is, the instrument panel will display "Vehicle XX controller fault, unable to enter camping mode". If not, proceed to step 3.3.

[0034] In step S3.3, the VCU detects the vehicle speed. If the vehicle speed V > V1, the instrument panel displays "Speed ​​Fault," and the vehicle cannot enter camping mode. V1 is calibrated to a minimum value, typically 1 km / h. V1 is used to prevent accidental activation of the camping mode button and parking signal malfunction during driving, which could lead to vehicle failure and loss of control. If V ≤ V1, the VCU locks the gear position "N or P" and no longer checks the gear shift signal to prevent accidental activation that could cause the vehicle to move. At the same time, the VCU locks the AutoHold function, preventing it from being released by other signals, to prevent accidental activation that could cause the vehicle's braking system to disengage, resulting in vehicle movement and a safety accident. The process then proceeds to step S3.4.

[0035] In step S3.4, the VCU detects the first SOC value E1 threshold set by the power battery. If SOC < E1, the VCU starts the engine and replenishes the battery with the maximum charging power allowed by the current vehicle until E1 is met, then proceeds to step S3.5. If SOC ≥ E1, then proceeds directly to step S3.5.

[0036] Step S3.5: VCU detects brake air pressure, where P1 represents the pneumatic brake pressure relief threshold. This threshold can be calibrated independently depending on the vehicle model. When P < P1, VCU starts the engine to replenish brake air pressure until P1 is met, then proceeds to step S4. When P ≥ P1, proceed directly to step S4.

[0037] Step S4: Enter camping mode. The instrument panel displays camping mode and starts timing. After 60 seconds, the instrument panel screen goes black. Lights unrelated to this mode and the vehicle's own electrical equipment enter a dormant state. The battery discharges autonomously through the vehicle's built-in inverter DC / AC. The superstructure draws power from the inverter for a long time. E2 is ≤10% under normal conditions. Determine if the battery SOC value is ≤E2. If yes, proceed to step S5.

[0038] Step S5: The instrument panel displays "Low battery, engine charging in progress". At the same time, the VCU sends an engine start command. The engine starts. The VCU integrates the power consumption of the superstructure and the power of the battery charging, and takes into account the NVH performance of the whole vehicle. Finally, it generates electricity at a certain rated engine speed. The generated electricity is distributed to the superstructure to ensure uninterrupted power consumption, and to the power battery to quickly replenish the power battery to E3. In camping mode, E1≥E3>E2, E3-E2≥10%. At the same time, it is determined whether the power battery SOC is ≤E2. If not, the current state is maintained. If so, the engine continues to charge at a certain rated speed to E3, and then step S6 is executed.

[0039] In step S6, the instrument panel displays that the power replenishment is complete, and the screen goes black again after 10 seconds; at the same time, the VCU sends an engine shutdown command, and the engine shuts down.

[0040] Note that in camping mode, if the brake air pressure P≤P2, the rear wheels will lock up, the entire vehicle will be locked and unable to move. When camping mode is deactivated, the entire vehicle will need to be re-inflated.

[0041] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A control method for a hybrid commercial RV camping mode, characterized in that: The specific steps are as follows: Step S1: When the vehicle enters the campsite, the vehicle is not powered off and remains in the "READY" state. The gear shifter is placed in "N" or "P", and the parking button is pulled up. The parking system starts working and sends a parking signal to the VCU. In RV camping mode, the initial battery charge retention threshold is set to E1, the minimum allowable SOC discharge value of the battery is set to E2, and the second battery charge retention threshold is set to E3. Step S2: Manually set E1 and E3 in MP5, where E3 ≤ E1. If E3 exceeds E1, it will be displayed in gray. The system defaults to E3 = E1. Step S3: Press the camping mode button and determine if the conditions for entering this mode are met. If they are met, proceed to step S4, where the conditions for entering this mode are determined in step S3. Includes the following steps; Step S3.1: After pressing the camping mode button, the VCU detects the information in step S1. If it is not executed properly, the instrument will display the corresponding information, such as "Vehicle not READY", "Brake system not working", "Gear not returned to N or P". Step 1 needs to be manually performed. If it is executed properly, proceed to step 3.

2. Step S3.2: The VCU checks whether there is a serious fault level in each controller of the vehicle. If there is, the instrument panel will display "Vehicle XX controller fault, unable to enter camping mode". If not, proceed to step 3.

3. In step S3.3, the VCU detects the vehicle speed. If the vehicle speed V > V1, the instrument panel will display "vehicle speed fault" and the vehicle will not be able to enter the camping mode. V1 is calibrated to a minimum value of 1 km / h. V1 is used to prevent accidental activation of the camping mode button and parking signal disorder during driving, which could lead to vehicle failure and loss of control. If V ≤ V1, the VCU locks the gear position "N or P" and no longer judges the gear shift signal to prevent the vehicle from moving due to accidental activation. At the same time, the VCU locks the AutoHold function and will not be released by other signals. Then, the process proceeds to step S3.

4. In step S3.4, the VCU detects the first SOC value E1 threshold set by the power battery. If SOC < E1, the VCU starts the engine and replenishes the battery with the maximum charging power allowed by the current vehicle until E1 is met, then proceeds to step S3.

5. If SOC ≥ E1, then proceeds directly to step S3.

5. Step S3.5: VCU detects brake air pressure, where P1 represents the pneumatic brake pressure relief threshold. This threshold can be calibrated independently depending on the vehicle model. When P < P1, VCU starts the engine to replenish brake air pressure until P1 is met, then proceeds to step S4. When P ≥ P1, proceed directly to step S4. Step S4: Enter camping mode. The battery discharges autonomously through the vehicle's built-in inverter (DC / AC). The superstructure draws power from the inverter for an extended period. The VCU determines whether the battery SOC value is ≤ E2. If so, proceed to step S5. In step S5, the instrument panel displays "Low battery, engine charging". At the same time, the VCU sends an engine start command. The engine starts, and the VCU integrates the power consumption of the superstructure and the power of the battery charging, while taking into account the NVH performance of the whole vehicle. Finally, it generates electricity at a certain rated engine speed. The generated electricity is distributed to the superstructure to ensure uninterrupted power consumption, and to the power battery to quickly replenish the power battery to E3.

2. The hybrid commercial RV camping mode control method according to claim 1, characterized in that: In camping mode, the instrument panel displays the camping mode and starts a timer. After 60 seconds, the instrument panel goes black, and lights and the vehicle's electrical equipment that are not related to this mode enter a dormant state.

3. The hybrid commercial RV camping mode control method according to claim 1, characterized in that: In camping mode, E1≥E3>E2, E3-E2≥10%, and at the same time, it is determined whether the SOC of the power battery is ≤E2. If not, the current state is maintained. If so, the engine continues to charge the battery at a certain rated speed until E3 is reached, and then step S6 is executed. In step S6, the instrument panel displays that the power replenishment is complete, and the screen goes black again after 10 seconds; at the same time, the VCU sends an engine shutdown command, and the engine shuts down.

4. The hybrid commercial RV camping mode control method according to claim 1, characterized in that: In camping mode, P2 represents the minimum threshold of the vehicle's brake air pressure. The VCU detects the brake air pressure, and if P≤P2, the instrument panel will display "Air pressure too low, do not drive" when it ends its sleep mode.

5. The hybrid commercial RV camping mode control method according to claim 4, characterized in that: When the brake air pressure P≤P2, the rear wheels will lock up, the entire vehicle will be locked and unable to move. When the camping mode is deactivated, the entire vehicle will be re-inflated to replenish the required air pressure.

6. The hybrid commercial RV camping mode control method according to claim 1, characterized in that: In camping mode, E2 is ≤10% under normal conditions.

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